Question

One of the following has petaloid sepal.
A. Pandanus
B. Althaea rosea
C. Mussaenda
D. Passiflora

Answer 1

Petaloid sepals are structures similar to petals but are not petals. It is a part of the flower of flowering plants. Reproduction of plants mainly takes place in the flowers which consist of both male and female gametes. Angiosperms are commonly called flowering plants.

Complete answer:
Flower is the main site of sexual reproduction in plants. It consists of calyx, corolla, sepals, and reproductive structures called androecium and gynoecium. Sepals are green in color and units of sepals form calyx that enclose the rest of the flower in the bud stage. However, they can be prominent or absent and petal-like in some species. Petaloid sepals are undifferentiated tepals that resemble petals.
-Pandanus is commonly referred to as pandanus palms. Pandanus do not have petaloid sepal and the leaves of the Pandanus are used in handicrafts.
-Althaea rosea is commonly called Hollyhock. They are perennial plants that are grown for the purpose of its flowers. The flowers of Hollyhock are used as an ornament. They do not show the presence of petaloid sepal.
-Several species of Mussaenda are cultivated for the purpose of ornamental plants. Petaloid sepals are seen in Mussaenda. The star-like flowers of Mussaenda are 10 mm in diameter and have a single, modified sepal.
-Passiflora is commonly known as passion flowers usually showy flowers with a distinctive corona. They do not show the presence of petaloid sepal.

So, option C is the correct option.

Note: Petal and petaloid are both different structures present in a plant. Petals are the colorful whorl of the flower which are attractive in look and act as an external pollinating agent in cross-pollination.